Process of making thin boiling starch.



PATENIED MAR. 10, 1908.

T. E. BREYBR. PROCESS OF MAKING THIN BOILING STARGH.

APPLICATION FILED APR.19. 1905.

v vice for removing the the bo toms thereof and with which communicates a delivery conduit D through which the starch is umped from the tanks and delivered to a ter press or similar desurplus water pre aratory to drying the starch. Valves d z are provided in the conduits D and D for controlling the flow of starch. from the respective tanks. The bottoms of the tanks are preterably provided with depressions a a binto which the ends of the conduits D D extend thereby permitting the ends of the conduits to project below the bottoms of the tanks so that-all of the starch may be drained from the tanks. Thermometers Z Z are preferably provided on the tanks A A to indicate the temperature of the starch.

The manner of using and operation of the above describedapparatus are ast'ollows: A heavy acidulated starch milk is pumped through the conduits B B into the tanks. The valve 7r is then turned so as to permit steam to pass through the pipe K into the steam jet device G where it is mixed with air drawn in through the inlet pipe ll. The mixed air and steam then passes through the horizontal conduit (1 and conduit C and C 110 the bottoms of the tanks where it is discharged through the perforations in the tubes coinmunicating with the lower ends of the conduits. The mixed steam and air passing through the starch milk heats the same thereby promoting the convcrsioir ol the same into thin boiling or modifiedest-arch. The mixture of steam and air also serves to keep the starch in suspension therebyavoiding the necessity of providing mechanical stirring mechanism. The valve G and' G permit either one or both of the tanks to be supplied with the mixed steam and air so that either tank alone may be used if dc sired. The valves 'f f are opened upon the first admission of steam and air to the conduit C so as to permit a portion of the mixtureto esca e and prevent the too rapid heating of the starch milk. By adjusting the position of the valves f f the tempera-- ture may be regulated by permitting a portion of the mixture to escape through the pipes F F The thermometers if L indi cate the temperature of the mixture and serve as a guide for the regulation of the valves f 7.

As soon as the thermometers 3 if indicate that the starch milk has acq u ired the desired temperature the mixture ct air and steam is shut of? by closing the vaives (5" G The valves 6 e are then opened admitting compressed air to the conduit Q 1 which is discharged through the starch milk thereby preventing" the settling of the starch. \Yhen the temperature of the starch milk in the tanks begins to fall the compressed air is shut oil by closing the valves 0 c and the mixture of steam and air is again turned on by opening the valves G When it is ascertained by testing that the starch has acquired the desired property, it is removed from the tanks through the conduits l), l)" and i) by opening the valves (1 d.

From the foregoing description it will. be observed that l lnrve-invented an improved process. for manufacturing thin boiling starch by the practice of which the starch milk is heated to the desired degree and coincidehtly agitated by discharging the heating medium in the starch milk.

1 Having new full y described my invention, what I claim new, and desire to secure by Letters Patent The process of manul'acturing thin boiling starch which consists in first discharging into acidulated starch milk a mixture of steam and air thereby imparting the requisite heat to the starch milk to promote the conversion thereof into thin boiling starch and coincidently keeping the starch in suspension, and subsequently after the desired ten'iperz'e ture has been acquired d iscon tinuing the discharge ol the mixed air and steam and discharging r-ompressod air in to the starch milk to )rcvent the starch from settling.

n testimony whereof I sign this tion in the presence oi two witnesses.

THROUGH E. BREYER. Witnesses:

FRANK W. Harness, Jas. F3. il lrotjihj specifica- 

